Merge remote-tracking branch 'origin/master' into 1.10

# Conflicts:
#	Source/Engine/Graphics/Materials/MaterialShader.h

Source/Editor/Windows/Assets/PrefabWindow.cs

@@ -355,13 +355,22 @@ namespace FlaxEditor.Windows.Assets
         private void OnPrefabOpened()
         {
             _viewport.Prefab = _asset;
-            _viewport.UpdateGizmoMode();
+            if (Editor.ProjectCache.TryGetCustomData($"UIMode:{_asset.ID}", out bool value))
+                _viewport.SetInitialUIMode(value);
+            else
+                _viewport.SetInitialUIMode(_viewport._hasUILinked);
+            _viewport.UIModeToggled += OnUIModeToggled;
             Graph.MainActor = _viewport.Instance;
             Selection.Clear();
             Select(Graph.Main);
             Graph.Root.TreeNode.Expand(true);
         }
 
+        private void OnUIModeToggled(bool value)
+        {
+            Editor.ProjectCache.SetCustomData($"UIMode:{_asset.ID}", value);
+        }
+
         /// <inheritdoc />
         public override void Save()
         {

Source/Editor/Windows/GameWindow.cs

@@ -23,6 +23,8 @@ namespace FlaxEditor.Windows
         private readonly GameRoot _guiRoot;
         private bool _showGUI = true;
         private bool _showDebugDraw = false;
+        private bool _audioMuted = false;
+        private float _audioVolume = 1;
         private bool _isMaximized = false, _isUnlockingMouse = false;
         private bool _isFloating = false, _isBorderless = false;
         private bool _cursorVisible = true;
@@ -91,6 +93,35 @@ namespace FlaxEditor.Windows
             set => _showDebugDraw = value;
         }
 
+
+        /// <summary>
+        /// Gets or set a value indicating whether Audio is muted.
+        /// </summary>
+        public bool AudioMuted
+        {
+            get => _audioMuted;
+            set
+            {
+                Audio.MasterVolume = value ? 0 : AudioVolume;
+                _audioMuted = value;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets a value that set the audio volume.
+        /// </summary>
+        public float AudioVolume
+        {
+            get => _audioVolume;
+            set
+            {
+                if (!AudioMuted)
+                    Audio.MasterVolume = value;
+
+                _audioVolume = value;
+            }
+        }
+
         /// <summary>
         /// Gets or sets a value indicating whether the game window is maximized (only in play mode).
         /// </summary>
@@ -648,6 +679,24 @@ namespace FlaxEditor.Windows
                 checkbox.StateChanged += x => ShowDebugDraw = x.Checked;
             }
 
+            menu.AddSeparator();
+
+            // Mute Audio
+            {
+                var button = menu.AddButton("Mute Audio");
+                button.CloseMenuOnClick = false;
+                var checkbox = new CheckBox(140, 2, AudioMuted) { Parent = button };
+                checkbox.StateChanged += x => AudioMuted = x.Checked;
+            }
+
+            // Audio Volume
+            {
+                var button = menu.AddButton("Audio Volume");
+                button.CloseMenuOnClick = false;
+                var slider = new FloatValueBox(AudioVolume, 140, 2, 50, 0, 1) { Parent = button };
+                slider.ValueChanged += () => AudioVolume = slider.Value;
+            }
+
             menu.MinimumWidth = 200;
             menu.AddSeparator();
         }